2 problems

Let $\rho_1,\rho_2$ be the ranks of the bulk Bloch bundles $\pazocal{E}_+$ and $\pazocal{E}_-$, and assume … Let $\pazocal{I}_e(P)$ denote the edge invariant, let $\mathbb{P}_h$ be…

Let a two-dimensional photonic crystal have a boundary and bulk band gaps. In each bulk band gap, consider the left- and right-moving boundary modes, and let the bulk Chern number…